What format is the video in? If the video isn’t formatted 100% correctly I found that OMX players performance differs drastically. Is there a noticeable difference between the 1080 and 720p versions? Without a heatsink it was a gamble to run 1080 videos as they almost never lasted the entire day the museum was open, 720 had a lot better results. is there audio? you can get a performance boost if you strip the audio component and just use a raw h264 stream.